Gregory-Smith, D. G. and Ingram, G. and Jayaraman, P. and Harvey, N. W. and Rose, M. G. (2001) 'Non-axisymmetric turbine end wall profiling.', Proceedings of the I MECH E part A : journal of power and energy., 215 (6). pp. 721-734.
A design method for profiling the end wall to reduce secondary flow has been reported previously. A profile has been tested in the Durham Linear Cascade and the results confirmed the design method. This paper describes the design and testing of a second-generation end wall, where the profiling is more suited to a real turbine. The new end wall has been tested in the linear cascade and a comprehensive set of measurements have been taken. These include traverses of the flow field upstream and downstream of the blade row, surface static pressure distributions on the end wall and flow visualization. Comparisons have been made with the results with a planar end wall and the earlier profiled end wall. Observed reductions in exit angle deviations are even greater than for the first design, although the loss reduction is not as great. The results verify the design, confirming profiled end walls as a means of reducing secondary flow, kinetic energy and loss. Overall an improved understanding of the effects of end wall profiling has been obtained although further work is required in this area.
|Keywords:||Turbines, Turbomachinery, End walls, Profiling, Non-axisymmetric, Secondary flow.|
|Full text:||PDF - Published Version (558Kb)|
|Publisher Web site:||http://dx.doi.org/10.1243/0957650011539027|
|Publisher statement:||© Gregory-Smith, D. G. and Ingram, G. and Jayaraman, P. and Harvey, N. W. and Rose, M. G., 2001. The definitive, peer reviewed and edited version of this article is published in Proceedings of the I MECH E part A : journal of power and energy, 215, 6, pp. 721-734, 10.1243/0957650011539027|
|Record Created:||18 Nov 2008|
|Last Modified:||10 Aug 2011 09:30|
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